ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yan Cheng,Cheng Yang,Tianxue Zhu,Che Wu,Jianying Huang,Yuekun Lai
Due to its widespread availability and spontaneity, moisture electricity generation (MEG) holds unique advantages in self-powered systems. However, it faces challenges, including the limitations of relying on a single kind of power generation and insufficient output performance. Inspired by the mechanisms of water absorption of plants, this paper explores a light-moisture coordinated electricity generating hydrogel (L-MEGH) device with flexible, scalable, and highly efficient energy conversion performance, which is obtained through the UV polymerization of hydrophilic acrylamide (AAM) and phytic acid (PA) in the presence of photosensitizers. The obtained hydrogel demonstrates superior moisture absorption and remarkable electricity generation stability across a range of humidity conditions. Notably, the open-circuit voltage ( V oc ) of the L-MEGH increased from 0.675 to 0.838 V after the addition of photosensitizers (Erythrosin B, E) (the significant enhancement, up to 24%), and the short-circuit current ( I sc ) reaching 635.543 µA. This L-MEGH can realize stable electrical output even under extreme temperatures, producing 0.5 V at −20 °C for 45 h. The scalable L-MEGHs (connected on-demand in series/parallel) can power various commercial electronics, including nighttime illumination, mobile phones, and health monitoring sensors. This work pioneers a sustainable power generation pathway capable of enhancing performance through the hybrid collection of multiple natural energy sources.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Nano Energy
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2022
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IF 19.069
Jin Yang,Jie An,Yanshuo Sun,Jianjun Zhang,Lulu Zu,Hao Li,Tao Jiang,Baodong Chen,Zhong Lin Wang
Human-machine interaction (HMI) has made great progress in the intelligent medical system, realizing the interaction between patients, medical staff and medical equipment . Here, we report a triboelectric nanogenerator with the flexible-stretchable polyvinyl alcohol/phytic acid (PVA/PA) hydrogel for self-powered HMI sensing in intelligent medical system. Benefiting from effective optimization design of materials, it possesses excellent mechanical and electrical properties, such as over 20,000 cycles durability, transparency, flexibility, and power density up to 1.33 W·m −2 . The device has a linearity of up to 0.949 in the tensile range of 200% and 0.992 in the bending angle range from 30° to 90°, respectively. Through processing and encoding the electrical signals collected by multiple channels in independent or synergistic mode, a self-powered medical nursing HMI system attached to patient fingers was developed to provide real-time help and assistance for both patients and medical staff, which the demand for distress calls can be successfully transmitted with just gently bending fingers in diagnosis. This work exhibits the application value of the self-powered triboelectric sensor to the medical HMI field, and can be extended to other aspects, showing a broad impact in brain computer interface .
研究领域:
生物医学工程
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材料科学
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智能医疗
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Ming Yang,Lang Chu,Yanfeng Zhuang,Cheng Qi,Si Meng,Zhou Liu,Tiantian Kong
The challenges of replicating the complex mechanical and structural diversity of natural tissues in vitro by leveraging multi-material digital light processing (DLP) bioprinting are addressed. This technique utilizes PEGDA-AAm bio-ink to develop multi-component, cell-laden hydrogel constructs with varying moduli. These constructs not only possess heterogeneous mechanical properties but also feature complex architectures and precisely engineered surface microstructures. The hydrogel microfluidic chips are successfully fabricated with perfusable microchannels, embedding various cell types within the matrix. This approach enables the bioprinting of intricate cell-laden structures with unique surface topologies, such as spiral grooves and triply periodic minimal surfaces (TPMS), which effectively influence cell alignment, spreading, and migration. By integrating various cell-laden PA hydrogels, the diverse mechanical moduli of biological tissues, including bone, liver lobules, and vascular networks are replicated. This technique ensures high-fidelity differentiation between cell types and regions. These findings provide valuable insights into the impact of substrate modulus and structure on cell behavior, underscoring the potential of multi-component, multi-modulus hydrogel constructs in creating sophisticated structures with custom-tailored mechanical properties. This study significantly advances the field by demonstrating the feasibility and effectiveness of multi-material DLP bioprinting in developing complex, functionally relevant tissue models for tissue engineering and regenerative medicine.
研究领域:
生物打印
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组织工程
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再生医学
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）